Siemens alarm 1000: Hotline alarm
SINUMERIK NCK general alarm · Siemens 840D/810D powerline
What it means
Alarm numbers 1000 to 1019 are a reserved class in the NCK general alarm range used for internal diagnosis output by the Siemens A&D MC hotline. The display shows internal error information that is not intended for self-diagnosis on site, and the Diagnostics Guide directs users to record the error text and contact the Siemens hotline, whose contact details are referenced via this alarm.
Likely causes
- Internal NCK software error caught by diagnostic routines
- Corrupted NCK firmware after a failed update
- DRAM or processor fault on the NCU module
- Supply brownout corrupting kernel state during operation
Triage note: Reserved hotline/diagnostic class 1000-1019; exact displayed text varies with software version.
Replacement parts
We supply the following units for this alarm — tested, warranty-backed:
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NCU 57x.x (6FC5373-…)
NCU module (if alarm recurs after clean restart) · Check if others ruled out
Need the part urgently?
Send us alarm 1000 with your machine details — typical RFQ turnaround is 24–48h.